In a rare legal move, Yahoo (YHOO) is asking a secretive U.S. surveillance court to let the public see its arguments in a 2008 case that played an important role in persuading tech companies to cooperate with a controversial government data-gathering effort.

Releasing those files would demonstrate that Yahoo “objected strenuously” to government demands for customers’ information and would also help the public understand how surveillance programs are approved under federal law, the company argued in a filing with the Foreign Intelligence Surveillance Court this week.